Immediately counterattack an enemy attack from within your range
An assault rifle produced by accessory manufacturers.
This here is the first assault rifle that the US firearm accessory manufacturer Magpul developed. They went on to sell production rights for it, and it's known as the "Bushmaster ACR" for civilian use and as the "Remington ACR" for military and law enforcement use. It uses 5.56mm NATO, 6.8mmx43SPC, and 7.62x39mm ammunition. This lets the user decide if they want more stability or more firepower, you see?